550121 has 8 divisors (see below), whose sum is σ = 646464. Its totient is φ = 461520.

The previous prime is 550117. The next prime is 550127. The reversal of 550121 is 121055.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 550121 - 2² = 550117 is a prime.

It is a super-2 number, since 2×550121² = 605266229282, which contains 22 as substring.

550121 is a modest number, since divided by 121 gives 55 as remainder.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 550096 and 550105.

It is not an unprimeable number, because it can be changed into a prime (550127) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1781 + ... + 2066.

It is an arithmetic number, because the mean of its divisors is an integer number (80808).

2⁵⁵⁰¹²¹ is an apocalyptic number.

It is an amenable number.

550121 is a deficient number, since it is larger than the sum of its proper divisors (96343).

550121 is a wasteful number, since it uses less digits than its factorization.

550121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3871.

The product of its (nonzero) digits is 50, while the sum is 14.

The square root of 550121 is about 741.7014224066. The cubic root of 550121 is about 81.9381349755.

Adding to 550121 its reverse (121055), we get a palindrome (671176).

The spelling of 550121 in words is "five hundred fifty thousand, one hundred twenty-one".